./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:49:11,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:49:11,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:49:11,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:49:11,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:49:11,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:49:11,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:49:11,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:49:11,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:49:11,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:49:11,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:49:11,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:49:11,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:49:11,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:49:11,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:49:11,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:49:11,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:49:11,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:49:11,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:49:11,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:49:11,236 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:49:11,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:49:11,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:49:11,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:49:11,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:49:11,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:49:11,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:49:11,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:49:11,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:49:11,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:49:11,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:49:11,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:49:11,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:49:11,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:49:11,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:49:11,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:49:11,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:49:11,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:49:11,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:49:11,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:49:11,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:49:11,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:49:11,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:49:11,278 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:49:11,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:49:11,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:49:11,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:49:11,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:49:11,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:49:11,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:49:11,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:49:11,281 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:49:11,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:49:11,282 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:49:11,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:49:11,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:49:11,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:49:11,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:49:11,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:49:11,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:49:11,283 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:49:11,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:49:11,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:49:11,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:49:11,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:49:11,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:49:11,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:49:11,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:49:11,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:49:11,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:49:11,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:49:11,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:49:11,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:49:11,287 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:49:11,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:49:11,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:49:11,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2022-07-19 15:49:11,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:49:11,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:49:11,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:49:11,544 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:49:11,545 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:49:11,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-07-19 15:49:11,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe07b8b6c/d9fbfda26c12458585c7516cbcf2ed6b/FLAG1096499bf [2022-07-19 15:49:12,058 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:49:12,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-07-19 15:49:12,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe07b8b6c/d9fbfda26c12458585c7516cbcf2ed6b/FLAG1096499bf [2022-07-19 15:49:12,449 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe07b8b6c/d9fbfda26c12458585c7516cbcf2ed6b [2022-07-19 15:49:12,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:49:12,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:49:12,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:49:12,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:49:12,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:49:12,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf874dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12, skipping insertion in model container [2022-07-19 15:49:12,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:49:12,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:49:12,614 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-07-19 15:49:12,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:49:12,640 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:49:12,650 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-07-19 15:49:12,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:49:12,671 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:49:12,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12 WrapperNode [2022-07-19 15:49:12,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:49:12,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:49:12,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:49:12,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:49:12,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,701 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-07-19 15:49:12,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:49:12,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:49:12,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:49:12,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:49:12,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:49:12,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:49:12,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:49:12,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:49:12,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (1/1) ... [2022-07-19 15:49:12,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:49:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:12,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 15:49:12,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 15:49:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:49:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 15:49:12,791 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 15:49:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:49:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:49:12,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:49:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 15:49:12,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 15:49:12,843 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:49:12,845 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:49:12,958 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:49:12,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:49:12,964 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 15:49:12,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:49:12 BoogieIcfgContainer [2022-07-19 15:49:12,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:49:12,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:49:12,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:49:12,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:49:12,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:49:12" (1/3) ... [2022-07-19 15:49:12,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a313b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:49:12, skipping insertion in model container [2022-07-19 15:49:12,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:12" (2/3) ... [2022-07-19 15:49:12,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a313b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:49:12, skipping insertion in model container [2022-07-19 15:49:12,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:49:12" (3/3) ... [2022-07-19 15:49:12,988 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2022-07-19 15:49:13,002 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:49:13,009 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:49:13,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:49:13,098 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5471ba8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d61821 [2022-07-19 15:49:13,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:49:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 15:49:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 15:49:13,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:13,117 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:13,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-07-19 15:49:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:13,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120802116] [2022-07-19 15:49:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:13,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 15:49:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:13,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 15:49:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:13,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 15:49:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:13,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 15:49:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:13,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 15:49:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:13,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 15:49:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 15:49:13,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120802116] [2022-07-19 15:49:13,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120802116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:13,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:13,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:49:13,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571658113] [2022-07-19 15:49:13,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:13,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:49:13,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:13,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:49:13,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:49:13,439 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 15:49:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:13,469 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-07-19 15:49:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:49:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-19 15:49:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:13,479 INFO L225 Difference]: With dead ends: 67 [2022-07-19 15:49:13,479 INFO L226 Difference]: Without dead ends: 31 [2022-07-19 15:49:13,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:49:13,488 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:13,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-19 15:49:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-19 15:49:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 15:49:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-07-19 15:49:13,551 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-07-19 15:49:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:13,552 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-07-19 15:49:13,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 15:49:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-07-19 15:49:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 15:49:13,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:13,556 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:13,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:49:13,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:13,559 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-07-19 15:49:13,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:13,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494427192] [2022-07-19 15:49:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:13,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:13,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:13,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010615868] [2022-07-19 15:49:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:13,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:13,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:13,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:13,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:49:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:49:13,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 15:49:13,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 15:49:13,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:13,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494427192] [2022-07-19 15:49:13,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:13,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010615868] [2022-07-19 15:49:13,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010615868] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:13,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:13,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-19 15:49:13,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197433368] [2022-07-19 15:49:13,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:13,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:49:13,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:13,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:49:13,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:49:13,884 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 15:49:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:13,995 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-07-19 15:49:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:49:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-07-19 15:49:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:13,997 INFO L225 Difference]: With dead ends: 48 [2022-07-19 15:49:13,997 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 15:49:13,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:49:13,999 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:13,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 108 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:49:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 15:49:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-07-19 15:49:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 15:49:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-07-19 15:49:14,009 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-07-19 15:49:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:14,010 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-07-19 15:49:14,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 15:49:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-07-19 15:49:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 15:49:14,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:14,011 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:14,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 15:49:14,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:14,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-07-19 15:49:14,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:14,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233689732] [2022-07-19 15:49:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:14,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:14,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348011308] [2022-07-19 15:49:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:14,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:14,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:14,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:14,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:49:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:14,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:49:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 15:49:14,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 15:49:14,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:14,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233689732] [2022-07-19 15:49:14,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:14,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348011308] [2022-07-19 15:49:14,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348011308] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 15:49:14,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:49:14,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-19 15:49:14,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997714037] [2022-07-19 15:49:14,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:14,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:14,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:14,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:49:14,538 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 15:49:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:14,606 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-07-19 15:49:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:49:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-07-19 15:49:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:14,611 INFO L225 Difference]: With dead ends: 39 [2022-07-19 15:49:14,611 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 15:49:14,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:49:14,616 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:14,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 15:49:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-19 15:49:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 15:49:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-07-19 15:49:14,634 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2022-07-19 15:49:14,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:14,635 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-07-19 15:49:14,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 15:49:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-07-19 15:49:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 15:49:14,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:14,637 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:14,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:14,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 15:49:14,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-07-19 15:49:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:14,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989914916] [2022-07-19 15:49:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:14,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:14,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:14,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916091509] [2022-07-19 15:49:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:14,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:14,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:14,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:14,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:49:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:49:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 15:49:15,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:15,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:15,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989914916] [2022-07-19 15:49:15,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:15,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916091509] [2022-07-19 15:49:15,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916091509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:15,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:15,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:49:15,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94139496] [2022-07-19 15:49:15,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:15,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:49:15,023 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 15:49:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:15,084 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-07-19 15:49:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:49:15,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-07-19 15:49:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:15,086 INFO L225 Difference]: With dead ends: 50 [2022-07-19 15:49:15,086 INFO L226 Difference]: Without dead ends: 48 [2022-07-19 15:49:15,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:49:15,088 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:15,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-19 15:49:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-19 15:49:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-19 15:49:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-07-19 15:49:15,097 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2022-07-19 15:49:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:15,098 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-07-19 15:49:15,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 15:49:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-07-19 15:49:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 15:49:15,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:15,099 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:15,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:15,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:15,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:15,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-07-19 15:49:15,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:15,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822016617] [2022-07-19 15:49:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:15,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:15,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:15,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895711568] [2022-07-19 15:49:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:15,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:15,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:15,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:15,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:49:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:15,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 15:49:15,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 15:49:15,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 15:49:15,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:15,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822016617] [2022-07-19 15:49:15,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:15,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895711568] [2022-07-19 15:49:15,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895711568] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 15:49:15,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:49:15,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-19 15:49:15,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106153949] [2022-07-19 15:49:15,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:15,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:15,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:49:15,705 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 15:49:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:15,757 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-07-19 15:49:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:49:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-07-19 15:49:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:15,759 INFO L225 Difference]: With dead ends: 54 [2022-07-19 15:49:15,759 INFO L226 Difference]: Without dead ends: 52 [2022-07-19 15:49:15,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:49:15,760 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:15,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-19 15:49:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-19 15:49:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-19 15:49:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-07-19 15:49:15,782 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2022-07-19 15:49:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:15,784 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-07-19 15:49:15,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 15:49:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-07-19 15:49:15,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 15:49:15,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:15,791 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:15,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 15:49:16,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:16,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-07-19 15:49:16,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:16,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244972705] [2022-07-19 15:49:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:16,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:16,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097548440] [2022-07-19 15:49:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:16,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:16,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:16,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:16,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:49:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:16,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 15:49:16,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 15:49:16,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:16,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:16,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244972705] [2022-07-19 15:49:16,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097548440] [2022-07-19 15:49:16,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097548440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:49:16,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:49:16,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-19 15:49:16,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875468134] [2022-07-19 15:49:16,648 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:16,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 15:49:16,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:16,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 15:49:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:49:16,649 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-19 15:49:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:16,902 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-07-19 15:49:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 15:49:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-07-19 15:49:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:16,903 INFO L225 Difference]: With dead ends: 60 [2022-07-19 15:49:16,903 INFO L226 Difference]: Without dead ends: 58 [2022-07-19 15:49:16,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:49:16,905 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:16,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 120 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:49:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-19 15:49:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-07-19 15:49:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-19 15:49:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-07-19 15:49:16,914 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2022-07-19 15:49:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:16,914 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-07-19 15:49:16,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-19 15:49:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-07-19 15:49:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 15:49:16,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:16,918 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:16,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 15:49:17,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:17,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2022-07-19 15:49:17,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:17,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63480588] [2022-07-19 15:49:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:17,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:17,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:17,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633619972] [2022-07-19 15:49:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:17,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:17,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:17,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:17,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:49:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:17,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:49:17,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-19 15:49:17,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-19 15:49:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63480588] [2022-07-19 15:49:17,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633619972] [2022-07-19 15:49:17,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633619972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:17,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:17,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-19 15:49:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012490243] [2022-07-19 15:49:17,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:17,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:49:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:49:17,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:49:17,357 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 15:49:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:17,540 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2022-07-19 15:49:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 15:49:17,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2022-07-19 15:49:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:17,543 INFO L225 Difference]: With dead ends: 102 [2022-07-19 15:49:17,543 INFO L226 Difference]: Without dead ends: 94 [2022-07-19 15:49:17,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:49:17,544 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:17,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 195 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:49:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-19 15:49:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-07-19 15:49:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-19 15:49:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-07-19 15:49:17,559 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2022-07-19 15:49:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:17,560 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-07-19 15:49:17,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 15:49:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-07-19 15:49:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 15:49:17,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:17,561 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:17,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:17,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:17,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:17,776 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2022-07-19 15:49:17,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:17,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869659194] [2022-07-19 15:49:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:17,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:17,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:17,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502275474] [2022-07-19 15:49:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:17,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:17,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:17,796 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:17,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:49:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 15:49:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-19 15:49:18,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-19 15:49:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:18,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869659194] [2022-07-19 15:49:18,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:18,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502275474] [2022-07-19 15:49:18,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502275474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:18,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:18,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-07-19 15:49:18,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765591336] [2022-07-19 15:49:18,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:18,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 15:49:18,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 15:49:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:49:18,126 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-19 15:49:18,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:18,470 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2022-07-19 15:49:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 15:49:18,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 71 [2022-07-19 15:49:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:18,474 INFO L225 Difference]: With dead ends: 128 [2022-07-19 15:49:18,474 INFO L226 Difference]: Without dead ends: 124 [2022-07-19 15:49:18,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-19 15:49:18,475 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:18,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 165 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:49:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-19 15:49:18,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2022-07-19 15:49:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-19 15:49:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-07-19 15:49:18,494 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2022-07-19 15:49:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:18,495 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-07-19 15:49:18,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-19 15:49:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-07-19 15:49:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 15:49:18,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:18,496 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:18,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:18,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:18,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2022-07-19 15:49:18,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:18,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973652979] [2022-07-19 15:49:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:18,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:18,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:18,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855239836] [2022-07-19 15:49:18,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:49:18,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:18,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:18,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:18,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:49:18,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:49:18,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:49:18,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 15:49:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-19 15:49:19,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-19 15:49:19,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973652979] [2022-07-19 15:49:19,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855239836] [2022-07-19 15:49:19,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855239836] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:19,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:19,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-07-19 15:49:19,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293082438] [2022-07-19 15:49:19,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:19,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:49:19,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:19,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:49:19,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:49:19,297 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-19 15:49:22,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:49:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:24,213 INFO L93 Difference]: Finished difference Result 236 states and 350 transitions. [2022-07-19 15:49:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 15:49:24,214 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 76 [2022-07-19 15:49:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:24,216 INFO L225 Difference]: With dead ends: 236 [2022-07-19 15:49:24,216 INFO L226 Difference]: Without dead ends: 234 [2022-07-19 15:49:24,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-07-19 15:49:24,217 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 129 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:24,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 237 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 497 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-07-19 15:49:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-19 15:49:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 225. [2022-07-19 15:49:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 120 states have internal predecessors, (146), 97 states have call successors, (97), 10 states have call predecessors, (97), 10 states have return successors, (96), 94 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-19 15:49:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 339 transitions. [2022-07-19 15:49:24,259 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 339 transitions. Word has length 76 [2022-07-19 15:49:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:24,260 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 339 transitions. [2022-07-19 15:49:24,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-19 15:49:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 339 transitions. [2022-07-19 15:49:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 15:49:24,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:24,261 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:24,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 15:49:24,487 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2022-07-19 15:49:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:24,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999647810] [2022-07-19 15:49:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:24,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:24,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:24,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818244600] [2022-07-19 15:49:24,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:49:24,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:24,498 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:24,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 15:49:24,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 15:49:24,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:49:24,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 15:49:24,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-19 15:49:25,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:25,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:25,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999647810] [2022-07-19 15:49:25,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:25,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818244600] [2022-07-19 15:49:25,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818244600] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:49:25,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:49:25,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-19 15:49:25,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246519585] [2022-07-19 15:49:25,555 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:25,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 15:49:25,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 15:49:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:49:25,556 INFO L87 Difference]: Start difference. First operand 225 states and 339 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-19 15:49:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:26,529 INFO L93 Difference]: Finished difference Result 241 states and 352 transitions. [2022-07-19 15:49:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 15:49:26,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2022-07-19 15:49:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:26,532 INFO L225 Difference]: With dead ends: 241 [2022-07-19 15:49:26,532 INFO L226 Difference]: Without dead ends: 239 [2022-07-19 15:49:26,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:49:26,534 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:26,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 149 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:49:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-19 15:49:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2022-07-19 15:49:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 129 states have internal predecessors, (155), 97 states have call successors, (97), 13 states have call predecessors, (97), 13 states have return successors, (96), 94 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-19 15:49:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 348 transitions. [2022-07-19 15:49:26,579 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 348 transitions. Word has length 81 [2022-07-19 15:49:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:26,580 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 348 transitions. [2022-07-19 15:49:26,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-19 15:49:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 348 transitions. [2022-07-19 15:49:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 15:49:26,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:26,581 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:26,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:26,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 15:49:26,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:26,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2022-07-19 15:49:26,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:26,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145157149] [2022-07-19 15:49:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:26,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:26,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:26,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250817771] [2022-07-19 15:49:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:26,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:26,809 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:26,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 15:49:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:26,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 15:49:26,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-19 15:49:27,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:27,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:27,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145157149] [2022-07-19 15:49:27,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:27,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250817771] [2022-07-19 15:49:27,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250817771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:49:27,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:49:27,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-19 15:49:27,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770341742] [2022-07-19 15:49:27,500 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:27,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 15:49:27,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:27,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 15:49:27,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:49:27,501 INFO L87 Difference]: Start difference. First operand 237 states and 348 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-19 15:49:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:28,108 INFO L93 Difference]: Finished difference Result 280 states and 403 transitions. [2022-07-19 15:49:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 15:49:28,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2022-07-19 15:49:28,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:28,111 INFO L225 Difference]: With dead ends: 280 [2022-07-19 15:49:28,111 INFO L226 Difference]: Without dead ends: 273 [2022-07-19 15:49:28,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-07-19 15:49:28,112 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:28,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 244 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:49:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-07-19 15:49:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2022-07-19 15:49:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 144 states have (on average 1.2222222222222223) internal successors, (176), 147 states have internal predecessors, (176), 109 states have call successors, (109), 16 states have call predecessors, (109), 16 states have return successors, (108), 106 states have call predecessors, (108), 108 states have call successors, (108) [2022-07-19 15:49:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 393 transitions. [2022-07-19 15:49:28,160 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 393 transitions. Word has length 87 [2022-07-19 15:49:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:28,161 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 393 transitions. [2022-07-19 15:49:28,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-19 15:49:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 393 transitions. [2022-07-19 15:49:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 15:49:28,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:28,163 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:28,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:28,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 15:49:28,375 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2022-07-19 15:49:28,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:28,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739325558] [2022-07-19 15:49:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:28,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:28,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491582726] [2022-07-19 15:49:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:28,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:28,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:28,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 15:49:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:28,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 15:49:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-19 15:49:28,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:29,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:29,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739325558] [2022-07-19 15:49:29,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:29,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491582726] [2022-07-19 15:49:29,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491582726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:49:29,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:49:29,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-19 15:49:29,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243089911] [2022-07-19 15:49:29,720 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:29,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 15:49:29,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 15:49:29,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-19 15:49:29,721 INFO L87 Difference]: Start difference. First operand 270 states and 393 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-19 15:49:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:30,405 INFO L93 Difference]: Finished difference Result 279 states and 401 transitions. [2022-07-19 15:49:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 15:49:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 103 [2022-07-19 15:49:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:30,408 INFO L225 Difference]: With dead ends: 279 [2022-07-19 15:49:30,409 INFO L226 Difference]: Without dead ends: 277 [2022-07-19 15:49:30,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-07-19 15:49:30,410 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 23 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:30,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 217 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:49:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-07-19 15:49:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2022-07-19 15:49:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 147 states have (on average 1.217687074829932) internal successors, (179), 150 states have internal predecessors, (179), 109 states have call successors, (109), 17 states have call predecessors, (109), 17 states have return successors, (108), 106 states have call predecessors, (108), 108 states have call successors, (108) [2022-07-19 15:49:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 396 transitions. [2022-07-19 15:49:30,453 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 396 transitions. Word has length 103 [2022-07-19 15:49:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:30,454 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 396 transitions. [2022-07-19 15:49:30,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-19 15:49:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 396 transitions. [2022-07-19 15:49:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-19 15:49:30,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:30,456 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:30,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:30,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 15:49:30,667 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2022-07-19 15:49:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:30,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732950605] [2022-07-19 15:49:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:30,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:30,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:30,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859514027] [2022-07-19 15:49:30,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:49:30,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:30,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:30,679 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:30,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 15:49:30,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:49:30,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:49:30,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:49:30,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-19 15:49:30,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:30,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:30,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732950605] [2022-07-19 15:49:30,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:30,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859514027] [2022-07-19 15:49:30,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859514027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:30,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:30,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:49:30,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171981476] [2022-07-19 15:49:30,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:30,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:30,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:30,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:49:30,762 INFO L87 Difference]: Start difference. First operand 274 states and 396 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-19 15:49:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:30,848 INFO L93 Difference]: Finished difference Result 346 states and 495 transitions. [2022-07-19 15:49:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:49:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2022-07-19 15:49:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:30,850 INFO L225 Difference]: With dead ends: 346 [2022-07-19 15:49:30,850 INFO L226 Difference]: Without dead ends: 185 [2022-07-19 15:49:30,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:49:30,852 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:30,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-19 15:49:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2022-07-19 15:49:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 99 states have (on average 1.121212121212121) internal successors, (111), 100 states have internal predecessors, (111), 59 states have call successors, (59), 17 states have call predecessors, (59), 17 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-07-19 15:49:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 228 transitions. [2022-07-19 15:49:30,878 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 228 transitions. Word has length 106 [2022-07-19 15:49:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:30,878 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 228 transitions. [2022-07-19 15:49:30,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-19 15:49:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 228 transitions. [2022-07-19 15:49:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-19 15:49:30,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:30,880 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:30,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:31,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 15:49:31,099 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash -200374723, now seen corresponding path program 2 times [2022-07-19 15:49:31,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:31,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357664975] [2022-07-19 15:49:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:31,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:31,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:31,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813199956] [2022-07-19 15:49:31,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:49:31,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:31,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:31,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 15:49:31,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:49:31,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:49:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 15:49:31,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-19 15:49:32,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-19 15:49:40,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:40,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357664975] [2022-07-19 15:49:40,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:40,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813199956] [2022-07-19 15:49:40,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813199956] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:40,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:40,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-07-19 15:49:40,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198267465] [2022-07-19 15:49:40,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:40,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 15:49:40,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 15:49:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=484, Unknown=2, NotChecked=0, Total=600 [2022-07-19 15:49:40,298 INFO L87 Difference]: Start difference. First operand 176 states and 228 transitions. Second operand has 25 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 15 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) [2022-07-19 15:50:04,123 WARN L233 SmtUtils]: Spent 22.14s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:50:08,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:23,439 WARN L233 SmtUtils]: Spent 14.99s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:50:25,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:27,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:31,110 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)))) (let ((.cse5 (<= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse1 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse4 (div |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse2 (not (= .cse6 |c_ULTIMATE.start_main_~a~0#1|)))) (and (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~c~0#1| (- 1)) |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse0 (div .cse3 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse0)) (<= .cse1 |c_ULTIMATE.start_main_~c~0#1|) .cse2 (= (+ (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse0 |c_ULTIMATE.start_main_~q~0#1|))) (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* .cse0 |c_ULTIMATE.start_main_~s~0#1|))))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse3 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (or (not (= |c_ULTIMATE.start_main_~b~0#1| 0)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 0)) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| .cse4)) |c_ULTIMATE.start_main_~r~0#1|)) (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse4 |c_ULTIMATE.start_main_~q~0#1|)))) 0) .cse5 (not (= (mod |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 0)) (< .cse4 (+ 2 |c_ULTIMATE.start_main_~k~0#1|)) .cse2 (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~b~0#1|)) |c_ULTIMATE.start_main_~b~0#1|))) (or .cse5 (not (= |c_ULTIMATE.start_main_~a~0#1| .cse1)) (= .cse6 (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| .cse4) (* |c_ULTIMATE.start_main_~x~0#1| .cse4 |c_ULTIMATE.start_main_~q~0#1|))) .cse2) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (* |c_ULTIMATE.start_main_~x~0#1| (+ (* (- 1) |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| 0)))))) is different from true [2022-07-19 15:50:33,122 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)))) (let ((.cse5 (<= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse1 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse4 (div |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse2 (not (= .cse6 |c_ULTIMATE.start_main_~a~0#1|)))) (and (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~c~0#1| (- 1)) |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse0 (div .cse3 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse0)) (<= .cse1 |c_ULTIMATE.start_main_~c~0#1|) .cse2 (= (+ (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse0 |c_ULTIMATE.start_main_~q~0#1|))) (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* .cse0 |c_ULTIMATE.start_main_~s~0#1|))))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse3 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (* |c_ULTIMATE.start_main_~x~0#1| (+ (* (- 1) |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| 0)) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 0) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| .cse4)) |c_ULTIMATE.start_main_~r~0#1|)) (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse4 |c_ULTIMATE.start_main_~q~0#1|)))) 0) .cse5 (not (= (mod |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 0)) (< .cse4 (+ 2 |c_ULTIMATE.start_main_~k~0#1|)) .cse2 (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~b~0#1|)) |c_ULTIMATE.start_main_~b~0#1|))) (or .cse5 (not (= |c_ULTIMATE.start_main_~a~0#1| .cse1)) (= .cse6 (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| .cse4) (* |c_ULTIMATE.start_main_~x~0#1| .cse4 |c_ULTIMATE.start_main_~q~0#1|))) .cse2)))) is different from true [2022-07-19 15:50:38,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:50:40,539 INFO L93 Difference]: Finished difference Result 220 states and 287 transitions. [2022-07-19 15:50:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 15:50:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 15 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) Word has length 109 [2022-07-19 15:50:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:50:40,541 INFO L225 Difference]: With dead ends: 220 [2022-07-19 15:50:40,541 INFO L226 Difference]: Without dead ends: 212 [2022-07-19 15:50:40,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=385, Invalid=1425, Unknown=4, NotChecked=166, Total=1980 [2022-07-19 15:50:40,543 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 179 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:50:40,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 270 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 811 Invalid, 4 Unknown, 9 Unchecked, 15.3s Time] [2022-07-19 15:50:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-19 15:50:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2022-07-19 15:50:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 114 states have internal predecessors, (125), 70 states have call successors, (70), 19 states have call predecessors, (70), 19 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-19 15:50:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 265 transitions. [2022-07-19 15:50:40,589 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 265 transitions. Word has length 109 [2022-07-19 15:50:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:50:40,589 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 265 transitions. [2022-07-19 15:50:40,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 15 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) [2022-07-19 15:50:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 265 transitions. [2022-07-19 15:50:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-19 15:50:40,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:50:40,591 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:50:40,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 15:50:40,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 15:50:40,799 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:50:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:50:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1098112047, now seen corresponding path program 2 times [2022-07-19 15:50:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:50:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208418816] [2022-07-19 15:50:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:50:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:50:40,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:50:40,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187681650] [2022-07-19 15:50:40,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:50:40,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:50:40,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:50:40,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:50:40,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 15:50:40,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:50:40,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:50:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-19 15:50:40,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:50:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 129 proven. 98 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-07-19 15:50:41,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:50:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 123 proven. 50 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-07-19 15:50:59,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:50:59,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208418816] [2022-07-19 15:50:59,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:50:59,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187681650] [2022-07-19 15:50:59,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187681650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:50:59,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:50:59,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-19 15:50:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784615891] [2022-07-19 15:50:59,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:50:59,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 15:50:59,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:50:59,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 15:50:59,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=350, Unknown=4, NotChecked=0, Total=462 [2022-07-19 15:50:59,666 INFO L87 Difference]: Start difference. First operand 204 states and 265 transitions. Second operand has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 16 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 14 states have call predecessors, (38), 15 states have call successors, (38) [2022-07-19 15:51:06,134 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 107 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:51:08,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:09,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:38,216 WARN L233 SmtUtils]: Spent 28.43s on a formula simplification. DAG size of input: 111 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:51:40,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:42,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:44,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:46,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:48,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:50,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:56,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:58,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:58,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:51:58,639 INFO L93 Difference]: Finished difference Result 264 states and 348 transitions. [2022-07-19 15:51:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 15:51:58,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 16 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 14 states have call predecessors, (38), 15 states have call successors, (38) Word has length 125 [2022-07-19 15:51:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:51:58,644 INFO L225 Difference]: With dead ends: 264 [2022-07-19 15:51:58,644 INFO L226 Difference]: Without dead ends: 262 [2022-07-19 15:51:58,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=168, Invalid=529, Unknown=5, NotChecked=0, Total=702 [2022-07-19 15:51:58,646 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 75 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 159 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-07-19 15:51:58,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 229 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 710 Invalid, 8 Unknown, 0 Unchecked, 21.6s Time] [2022-07-19 15:51:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-19 15:51:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-07-19 15:51:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 145 states have (on average 1.089655172413793) internal successors, (158), 147 states have internal predecessors, (158), 94 states have call successors, (94), 22 states have call predecessors, (94), 22 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-07-19 15:51:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 346 transitions. [2022-07-19 15:51:58,735 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 346 transitions. Word has length 125 [2022-07-19 15:51:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:51:58,735 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 346 transitions. [2022-07-19 15:51:58,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 16 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 14 states have call predecessors, (38), 15 states have call successors, (38) [2022-07-19 15:51:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 346 transitions. [2022-07-19 15:51:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-19 15:51:58,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:51:58,738 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:51:58,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 15:51:58,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:51:58,955 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:51:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:51:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1419250666, now seen corresponding path program 3 times [2022-07-19 15:51:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:51:58,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621436367] [2022-07-19 15:51:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:51:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:51:58,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:51:58,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646083049] [2022-07-19 15:51:58,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:51:58,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:51:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:51:58,966 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:51:58,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 15:51:59,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 15:51:59,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:51:59,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-19 15:51:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:51:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 86 proven. 69 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-19 15:51:59,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:52:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:52:00,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621436367] [2022-07-19 15:52:00,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:52:00,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646083049] [2022-07-19 15:52:00,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646083049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:52:00,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:52:00,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-19 15:52:00,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428729349] [2022-07-19 15:52:00,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:52:00,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 15:52:00,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:52:00,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 15:52:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-07-19 15:52:00,872 INFO L87 Difference]: Start difference. First operand 262 states and 346 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-19 15:52:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:52:01,948 INFO L93 Difference]: Finished difference Result 360 states and 485 transitions. [2022-07-19 15:52:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 15:52:01,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 145 [2022-07-19 15:52:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:52:01,951 INFO L225 Difference]: With dead ends: 360 [2022-07-19 15:52:01,952 INFO L226 Difference]: Without dead ends: 358 [2022-07-19 15:52:01,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 15:52:01,952 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:52:01,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 223 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:52:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-07-19 15:52:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 355. [2022-07-19 15:52:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 192 states have (on average 1.1041666666666667) internal successors, (212), 194 states have internal predecessors, (212), 134 states have call successors, (134), 28 states have call predecessors, (134), 28 states have return successors, (134), 132 states have call predecessors, (134), 134 states have call successors, (134) [2022-07-19 15:52:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 480 transitions. [2022-07-19 15:52:02,080 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 480 transitions. Word has length 145 [2022-07-19 15:52:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:52:02,081 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 480 transitions. [2022-07-19 15:52:02,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-19 15:52:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 480 transitions. [2022-07-19 15:52:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-19 15:52:02,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:52:02,084 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:52:02,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 15:52:02,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 15:52:02,299 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:52:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:52:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2114909687, now seen corresponding path program 4 times [2022-07-19 15:52:02,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:52:02,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427876783] [2022-07-19 15:52:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:52:02,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:52:02,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:52:02,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549799538] [2022-07-19 15:52:02,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:52:02,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:52:02,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:52:02,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:52:02,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 15:52:02,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:52:02,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:52:02,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-19 15:52:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:52:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 185 proven. 117 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2022-07-19 15:52:03,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:52:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 224 proven. 32 refuted. 0 times theorem prover too weak. 859 trivial. 0 not checked. [2022-07-19 15:52:05,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:52:05,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427876783] [2022-07-19 15:52:05,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:52:05,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549799538] [2022-07-19 15:52:05,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549799538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:52:05,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:52:05,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-07-19 15:52:05,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285835245] [2022-07-19 15:52:05,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:52:05,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 15:52:05,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:52:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 15:52:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-07-19 15:52:05,060 INFO L87 Difference]: Start difference. First operand 355 states and 480 transitions. Second operand has 26 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 14 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-07-19 15:52:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:52:14,277 INFO L93 Difference]: Finished difference Result 413 states and 546 transitions. [2022-07-19 15:52:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 15:52:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 14 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 167 [2022-07-19 15:52:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:52:14,280 INFO L225 Difference]: With dead ends: 413 [2022-07-19 15:52:14,281 INFO L226 Difference]: Without dead ends: 411 [2022-07-19 15:52:14,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=419, Invalid=2131, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 15:52:14,282 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 70 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:52:14,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 277 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-19 15:52:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-07-19 15:52:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 385. [2022-07-19 15:52:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 214 states have (on average 1.0934579439252337) internal successors, (234), 217 states have internal predecessors, (234), 135 states have call successors, (135), 35 states have call predecessors, (135), 35 states have return successors, (135), 132 states have call predecessors, (135), 135 states have call successors, (135) [2022-07-19 15:52:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 504 transitions. [2022-07-19 15:52:14,402 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 504 transitions. Word has length 167 [2022-07-19 15:52:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:52:14,402 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 504 transitions. [2022-07-19 15:52:14,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 14 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-07-19 15:52:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 504 transitions. [2022-07-19 15:52:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-19 15:52:14,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:52:14,404 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:52:14,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 15:52:14,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 15:52:14,623 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:52:14,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:52:14,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 5 times [2022-07-19 15:52:14,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:52:14,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695662261] [2022-07-19 15:52:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:52:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:52:14,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:52:14,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506551164] [2022-07-19 15:52:14,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:52:14,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:52:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:52:14,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:52:14,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 15:52:14,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-19 15:52:14,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:52:14,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-19 15:52:14,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:52:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 152 proven. 135 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2022-07-19 15:52:18,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:52:32,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:52:32,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695662261] [2022-07-19 15:52:32,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:52:32,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506551164] [2022-07-19 15:52:32,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506551164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:52:32,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:52:32,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-07-19 15:52:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87674086] [2022-07-19 15:52:32,376 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:52:32,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 15:52:32,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:52:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 15:52:32,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=790, Unknown=3, NotChecked=0, Total=992 [2022-07-19 15:52:32,377 INFO L87 Difference]: Start difference. First operand 385 states and 504 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2022-07-19 15:52:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:52:35,412 INFO L93 Difference]: Finished difference Result 456 states and 578 transitions. [2022-07-19 15:52:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 15:52:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 175 [2022-07-19 15:52:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:52:35,415 INFO L225 Difference]: With dead ends: 456 [2022-07-19 15:52:35,415 INFO L226 Difference]: Without dead ends: 454 [2022-07-19 15:52:35,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=349, Invalid=1540, Unknown=3, NotChecked=0, Total=1892 [2022-07-19 15:52:35,416 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 51 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:52:35,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 284 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 15:52:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-19 15:52:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2022-07-19 15:52:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 256 states have (on average 1.0859375) internal successors, (278), 259 states have internal predecessors, (278), 147 states have call successors, (147), 46 states have call predecessors, (147), 46 states have return successors, (147), 144 states have call predecessors, (147), 147 states have call successors, (147) [2022-07-19 15:52:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 572 transitions. [2022-07-19 15:52:35,521 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 572 transitions. Word has length 175 [2022-07-19 15:52:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:52:35,522 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 572 transitions. [2022-07-19 15:52:35,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2022-07-19 15:52:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 572 transitions. [2022-07-19 15:52:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-19 15:52:35,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:52:35,526 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:52:35,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 15:52:35,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 15:52:35,750 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:52:35,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:52:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1062534286, now seen corresponding path program 6 times [2022-07-19 15:52:35,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:52:35,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420740217] [2022-07-19 15:52:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:52:35,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:52:35,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:52:35,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697207876] [2022-07-19 15:52:35,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:52:35,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:52:35,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:52:35,761 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:52:35,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 15:52:37,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 15:52:37,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:52:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 15:52:37,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:52:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 210 proven. 21 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2022-07-19 15:52:39,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:52:39,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:52:39,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420740217] [2022-07-19 15:52:39,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:52:39,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697207876] [2022-07-19 15:52:39,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697207876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:52:39,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:52:39,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-19 15:52:39,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577292035] [2022-07-19 15:52:39,801 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:52:39,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 15:52:39,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:52:39,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 15:52:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-19 15:52:39,802 INFO L87 Difference]: Start difference. First operand 450 states and 572 transitions. Second operand has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-07-19 15:52:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:52:43,369 INFO L93 Difference]: Finished difference Result 454 states and 575 transitions. [2022-07-19 15:52:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 15:52:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 197 [2022-07-19 15:52:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:52:43,370 INFO L225 Difference]: With dead ends: 454 [2022-07-19 15:52:43,371 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 15:52:43,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-07-19 15:52:43,372 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:52:43,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 189 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-19 15:52:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 15:52:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 15:52:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:52:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 15:52:43,374 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 197 [2022-07-19 15:52:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:52:43,374 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 15:52:43,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-07-19 15:52:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 15:52:43,374 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 15:52:43,377 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 15:52:43,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-19 15:52:43,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:52:43,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.